1. Consists of 10,341 restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting. The RSUs will vest as to 25% of the original number of shares on each of April 1, 2020, April 1, 2021, April 1, 2022, and April 1, 2023.

2. Includes 43,547 RSUs (including the 10,341 RSUs described in footnote 1). Each RSU represents the right to receive one share of common stock upon vesting.

3. The sales reported were used to pay tax withholding in connection with the vesting of RSUs.

4. Includes 42,297 RSUs. Each RSU represents the right to receive one share of common stock upon vesting.

Remarks:

/s/ Janene I. Asgeirsson, attorney-in-fact

04/22/2019

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).